High-Performance Redundant Controller for Demanding Process Applications
The AFS20D/AFG20D function as high-performance duplexed field control units within the CENTUM VP and CS 3000 DCS environments. These units execute complex control logic while maintaining continuous operation through a fully redundant architecture. They interface seamlessly with both Vnet/IP networks and RIO bus systems for maximum flexibility . This robust design ensures zero single points of failure in critical industrial processes.
Technical Specifications
The table below details the key technical parameters for these duplexed field control units.
| Parameter | AFS20D / AFG20D Specification |
|---|---|
| Processor | VR5432 RISC, 133 MHz |
| Main Memory | 16 MB (AFS20D) / 32 MB (AFG20D) |
| Memory Backup | Battery maintains data for up to 72 hours; recharge time is 48 hours minimum |
| Number of FIO Slots | 32 slots |
| Power Input Options | 100-120 V AC, 220-240 V AC, or 24 V DC |
| Power Consumption (AC) | 450 VA (100-120 V) / 480 VA (220-240 V) |
| Power Consumption (DC) | 10 A (24 V DC input) |
| Max. Connectable Nodes | 8 nodes |
| Network Interface | Dual-redundant Vnet/IP and RIO bus |
| FCU Status Contact | 3 terminals (NC, NO, C); contacts open or close during FCU failure; rated 250 V AC, 2 A max |
| Weight | Approx. 250 kg (excluding nodes); approx. 400 kg (with max. nodes installed) |
| Cabinet Dimensions | 19-inch rack mountable with cabinet |
| Protection Rating | IP20 |
Redundant Architecture and System Integration
The AFS20D/AFG20D offer dual-redundant configurations across processors, power supplies, and communication paths for maximum system availability. These units support both FIO (Field I/O) and RIO (Remote I/O) module families, providing exceptional design flexibility. The battery-backed memory retains critical data for up to 72 hours during power interruptions, ensuring seamless process recovery. For installations requiring additional protection, you can order variants with explosion protection and ISA Standard G3 options . These units also operate reliably across a wide temperature range from 0°C to 50°C .
Details
| Weight | 0.7 kg |
|---|---|
| Dimensions | 2.5 × 20.3 × 15.2 mm |
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